body{
    box-sizing: border-box;
    font-family: Arial;
    margin: 0;
    height: 100vh;
}

header{
   padding: 0px;
    text-align: center;
}


main{
    width: 100%;
    padding: px;
    box-sizing: border-box;
    margin: 0 auto;
   
}

.btn {
    display: inline-block;
    background-color: firebrick;
    padding: 6px 12px;
    color: #fff;
    border-radius: 18px;
    text-decoration: none;
    transition: 0.3s;
}

.btn:hover{
    filter: brightness(1.1)
}

.hes-gallery{
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr;
    grid-gap: 15px;
    padding: 15px;
}

.hes-gallery img {
    width: 100%;
    object-fit: cover;
    transition: 0.3s;
    cursor: pointer;
}

.hes-gallery img:hover
{
    transform: scale(1.04);
    box-shadow: 2px 2px 6px #555;
}


@media (max-width: 800px) {
    main{
        width: 100%;
    }
    header img{
       
    }
    .hes-gallery{
        grid-template-columns: 1fr 1fr 1fr;
    }
}

@media (max-width: 500px) {
    .hes-gallery{
        grid-template-columns: 1fr 1fr;
    }
}